This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | -391 |
| 3 | -18352 |
| 4 | -247503 |
| 5 | -1792074 |
| 6 | -8306135 |
| 7 | -20866436 |
| 8 | 80141153 |
| 9 | 1970527202 |
| 10 | 24937424601 |
| 11 | 282953722920 |
| 12 | 3133268596369 |
| 13 | 34512107644558 |
| 14 | 379729172536457 |
| 15 | 4177209726056276 |
| 16 | 45949661144095425 |
| 17 | 505446909911417274 |